Viacom (VIA.B) announced Tom Freston and Leslie Moonves have been appointed co-presidents and co-CEOs, effective immediately. Feston and Moonves will succeed president and COO Mel Karmazin, who has resigned. The resignation follows several years of tension between Karmazin and chairman and CEO Sumner Redstone.

Newport (NEWP) signed an agreement with Thermo Electron (TMO) to buy Spectra-Physics, the optical technology business of Thermo Electron, for $200 million cash, $50 million in Newport stock, and a $50 million promissory note, subject to adjustments.

Immucor (BLUD) set a 3-for-2 stock split. The company also set an additional 200,000 share buyback.